Barcode reading method and barcode reading device

摘要

A barcode reading method and a barcode reading device are provided. An image sensor is utilized to capture an image of a barcode via an optical lens, and then a triangulation method and an ideal lens imagining method are collocated to calculate the digital image so as to produce an optimum image distance. A distance between the image sensor and the optical lens is then adjusted in accordance with the optimum image distance, so that the barcode can be immediately and clearly imaged on the image sensor.

主权项

1. A barcode reading method, comprising:
(a) using an image sensor to capture a digital image of a barcode through an optical lens, wherein the image sensor and the optical lens are spaced an initial image distance apart, two calibration images are projected on the barcode at a first distance spaced apart from each other, so that the two calibration images are spaced a second distance apart in the captured digital image; (b) calculating the digital image; and (c) adjusting a distance between the image sensor and the optical lens to reimage the barcode on the image sensor.